export declare const exists: (value: any) => boolean;
export declare const hasValue: (value: any) => boolean;
export declare const isEmptyString: (value: string) => boolean;
export declare const isValidEmail: (value: string) => boolean;
export declare const isValidUrl: (value: string) => boolean;
export declare const isValidRelativeUrl: (value: string) => boolean;
export declare const isValidColor: (value: string) => boolean;
export declare const isValidDate: (date: Date) => boolean;
export declare const normalizeDate: (value: any) => string;
export declare const addTimezoneOffset: (date: Date) => Date;
export declare const isValidNumber: (value: string | number | undefined | null) => boolean;
export declare const numberOfDecimalDigits: (x: number | string) => number | undefined;
export declare const numberOfWholeDigits: (x: number | string) => number | undefined;
export declare const roundToMultipleOf: (x: number, modulo: number) => number;
export declare const isInitialAndEmpty: (previousValue: any, newValue: any) => boolean;